Improvement in oatmeal-machines



8.11. GORMACK.

` Oatmeal-Machine.

' No. 210,188. f Patented Nav. 26,1878.

' n. Pers-ns. Fumo-mamma. wnsumeron o c UNITED STATES PATENT OEEIoE.

GEORGE H. OORMAOK, OF EOOKFORD, ILLINOIS, ASSIGNOR TO A. M. JOHNSTON & OO., OF SAME PLACE.

IMPROVEMENT .IN OATMEAL-MACH INEs.

Specification forming part of Letters Patent No. 210,188, dated November 26, 1878; application filed March 26, 1878.A

To all whom it may concern: y

Beit known that I, GEORGE H. CoRMAcK,

of the city of `Rockford, in the county of Winnebago and State of Illinois, have invented a vnew and useful Improvementin Oat-Milling Machines, of which the following is a specilication:

This invention relates to that class of machines employed in the manufacture of oatmeal or grits, and is employed, after the chaffy hull or shuck has been removed, to out the grain into small sections or grits, forming ap clean sharp oatmeal with but little waste.

To this end I have devised and constructed the machine represented in the accompanying l' clearly show the notched or toothed plate.

In the drawings, A represents an oat-cuttin g cylinder, formed of disks provided on their periphery with alternate annular grooves b and annular fillets c in about equal divisions.

The annular iillets c, which rise above the annular grooves 1), are vat proper intervals formed in teeth similar to the teeth of a circular slitting-saw. A series of these disks with annular grooves and annular fillets, toothed as above, are mounted on a shaft, B, to which they are iixed to revolve with the shaft. A sufficient number of these disks are placed on the shaft in close contact to form a cutting-cylinder of any practical length. The shaft of this cylinder is fitted to revolve in bearings on the horizontal vbeams O of the main frame, with the grooved and toothed cylinder to revolve between the beams.

The beams O form the sides of the main supporting-frame, and are connected by end beams, D, framed into their inner faces toward their ends. This horizontal frame is supported on posts E, framed into the under faces of the side beams, C. These parts-viz., the side beams, O, end beams, D, and posts E-form the main frame, in which. the cutting-cylinder is mounted to revolve on its journal-bearin gs.

touch the cutting-cylinder, and in lthis position is secured tothe main frame firmly.

H is a' metallic plate having one o r both of its edges notched in comb form, having teeth h to correspond, and tted to enter the annular grooves b in the cutting-cylinder, and

notches t', which receive the teeth formed in the annular fillets c on the cutting-cylinder. This toothed plate is provided with a transverse slot, k, and the plate is placed on the inclined end c in such position that its teeth li enter the grooves b, and the notches t receive the teeth on the iillets c in suoli a manner as to permit the cylinder to revolve freely. The

teeth II of the plate H and the grooves bin the cutting-cylinder A, the teeth c in the cylinderA and the notches i in the plate H, are

madepto it as close as practicable, to permit of. the cylinder revolving freely without cut- -ting the teeth in the plate. ais a cap-plate having beveled edges, and is placed on the upper side of the toothed plate H, with one of its beveled edges toward the toothed cylinder, A

and at such a distance from it as to permit the oat-grains to freely pass from the hopper to the toothed plate, and to prevent them being thrown' therefrom when acted upon by the teeth of the cylinder. This beveledged plate a and the toothed plate H-arevheld in an adjustable manner in position on the beveling end c by means of a screw, Z, which is passed upward through the beveled end e, toothed plate H, and screw-threaded into the bevel-edged cap-plate a.

L represents a pulley mounted on the ontward-proj ectin g end of the cylinder-shaft, and is for the purpose of imparting motion to the 'cylinder bymeans of a belt connecting the pulley with a driving-pulley connected with the motor.

In the manufacture of oatmeal with my imv proved oat-cutting machine, with the machine set in motion in the direction indicated by the arrows, the shelled oats are passed into the' hopper onto the toothed cylinder in any convenient manner, and the rotation of the cylinder in connection with gravity will carry the oat-grains onto the teeth of the plate H, Where they will be cut into meal or grits by the shear action ot' the teeth of the cylinder passing between the fixed teeth of the toothed plate H, and carried through with the revolving cylinder, and permitted t0 drop into any receptacle provided for its reception. In this method of cutting oats in the manufacture of meal, the tendency would be to throw the grain from the cutters, and the grain would be liable to approach -the cutters cndwise, all of which would tend to retard the operation and lessen the quantity of sharp grits and increase the quantity ot' dust or iine meal from a given quantity ot' grain. To obviate the above tendencies, I have introduced the bevel-edged plate a to narrow the throat and prevent the throwing back of the grain.

In the foregoing I have described my improved cutting-cylinder made ot' disks of considerable thickness, constructed with alternate grooves and toothed fillets mounted on a suitable shaft in close contact, and this method I prefer, and I also prefer to make these disks of a good quality ot' iron, and case-hardened; but they may be madeof any suitable matef rial; and, instead of the groovcd disks, the cylinder may be made of one piece, or ot' thin or plate disks alternately large and small. The

large disks being toothed, as hereinbeforc de- GEORGE n. conMAcK.

Witnesses:

A. O. BEHEL, DUNCAN FERGUSON. 

